<%--
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  User: 孙亚梅
  Date: 2022/5/17
  Time: 10:18
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--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>




        //7:设置ajax请求方式和请求路径
        xmlhttp.open();
        //8：设置ajax的请求头
        xmlhttp.setRe
</body>
</html>
